To increase the advertisement interval for Peripheral in CC2540

Ramesh Kumar Jayaraj

Other Parts Discussed in Thread: CC2540

Hi,

I am developing an application with Peripheral Component using the CC2540 USB dongle loaded with the Version 1.4.0 HostTestRelease.

To configure the dongle as peripheral, I have send the following commands and got the success as success.

1. GAP_DeviceInit 2. GAP_UpdateAdvertisingData 3. GAP_SetParam 4. GAP_MakeDiscoverable.

My query is, Even I set the advertising limit as 32 mSec as max, the advertisement is not done for 12 msec.

I have initialized the device as only Peripheral.

And I have set the following Param Id for limited and general discoverable mode.

i. TGAP_LIM_DISC_ADV_INT_MIN to 20 mSec ii. TGAP_LIM_DISC_ADV_INT_MAX to 32 mSec iii. TGAP_GEN_DISC_ADV_INT_MIN to 20 mSec iv. TGAP_GEN_DISC_ADV_INT_MAX to 32 mSec.

Even that the GAP_MakeDiscoverable response with only 12 mSec, and its not changed.

Kindly correct me, whether the configuration of dongle as peripheral with the given commands. Also, how to extend the advertisement interval little longer or modifyable?

Thanks in advance.

over 10 years ago

0 Dhaval V over 10 years ago

Genius 4470 points

Hi Ramesh,

You can try by setting same advertising interval values for all four TGAP_LIM_DISC_ADV_INT_MIN/MAX and TGAP_GEN_DISC_ADV_INT_MIN/MAX. Also, please keep in mind that the value is in units of 625us. For example, if you want to set advertising interval as 100ms then you need to use value 160 (160 * 625us = 100ms).

Hope this helps!

Thanks,

Dhaval

Note: You may want to click on "Verify Answer", if this has answered your question.

0 Ramesh Kumar Jayaraj over 10 years ago in reply to Dhaval V

Intellectual 310 points

Hi Dhaval,

Thanks for your prompt reply on my query.

Even after I set the advertising interval for all four param IDs with 0x00A0 (160 => 160 * 625us = 100 ms) got the response as 0x00C0 as same as for the old intervals.

Whether do i need to set any other param IDs additionally?

Note: Advertisement stops after responding to the GAP_MakeDiscoverable command.

0 Dhaval V over 10 years ago in reply to Ramesh Kumar Jayaraj

Genius 4470 points

It should work. If possible, can you please share you code snippet?

0 Ramesh Kumar Jayaraj over 10 years ago in reply to Dhaval V

Intellectual 310 points

Thanks Dhaval.

Yes, actually the advertising is happening, but not within the time limit what we set as min and max. The response data still has 0x00C0 only.
But it has keep on advertising still i send End_Discoverable command.

I am not sure whether the time limit is set through the commands which I have sent for min and max.

0 Tim C over 10 years ago in reply to Ramesh Kumar Jayaraj

TI__Mastermind 34660 points

It sounds like you are doing the correct sequence. It works when I do it (see attached log with 0xA0 highlighted in yellow). Can you compare your byte data to my log or post yours?

/cfs-file/__key/communityserver-discussions-components-files/538/advertising-log.htm

0 Dhaval V over 10 years ago in reply to Ramesh Kumar Jayaraj

Genius 4470 points

Hi Ramesh,

Why are you calling End_Discoverable command? Instead, you can try to use -

uint16 advertOffTime = ADVERTISING_DURATION;

GAP_SetParamValue( TGAP_LIM_ADV_TIMEOUT, advertOffTime );

After setting this parameter, device stops advertisement automatically after the set duration.

Thanks,

Dhaval

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To increase the advertisement interval for Peripheral in CC2540